10 Best Ls Engine Intake Manifolds

The best LS intake manifold depends first on cylinder-head port shape, induction type and available clearance—not simply the largest throttle-body bore. This shortlist covers cathedral-port LS1, LS2 and LS6-style applications, rectangular-port LS3/L92 combinations, EFI and carbureted conversions, and street or high-RPM builds. The Htostar Racing IM-1012A-S-JL leads for cable-throttle cathedral-port EFI swaps because it combines a 102 mm inlet with a listed throttle body, TPS, IAC and fuel-system provisions. Other picks make more sense when you need a 92 mm package, a carbureted dual-plane, a very tall Hi-Ram or a lower-profile rectangular-port design.

Selections were based on documented engine and port compatibility, throttle-body and fuel-system interfaces, induction type, published operating range, height and clearance information, included hardware, and the practical tradeoffs of each design. A complete EFI kit received more consideration for a buyer replacing several components, while a manifold-only or carbureted option can still be a strong choice when the rest of the combination is already established. The rankings also separate appropriate use cases instead of treating maximum airflow as the universal goal. Dual-plane designs are better aligned with broad street torque, single-plane and Hi-Ram designs favor higher-RPM combinations, and low-profile manifolds help when hood or accessory clearance is limited. Every recommendation still requires verification against the actual head casting, throttle-control strategy, injector and rail arrangement, accessory package, and ECU or carburetor setup.

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Top-rated Comparison

Our Top 10 Picks

Best cable-drive package

Htostar Racing IM-1012A-S-JL

For cathedral-port LS EFI swaps needing a bundled 102 mm cable-throttle assembly; it includes useful control hardware, but LS2 injector fit may require spacers.

Listed for LS1, LS2 and LS6-style cathedral-port heads with a 102 mm inlet and drive-by-cable throttle body.
The throttle-body listing specifies installed IAC and TPS, a 1,218 CFM flow rating, and 1/4NPT and 1/8NPT vacuum provisions.
The listing says LS1 and LS6 factory injectors fit, while LS2 applications may need different spacers.

9.3

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Best 92mm cable EFI kit

POSENG IM-1001A-BK-CS

For cable-throttle cathedral-port builds that need most of the EFI hardware in one package; injectors and drive-by-wire compatibility are not included.

Listed for 4.8L, 5.3L, 5.7L and 6.0L LS-based engines with cathedral-port heads and a 92 mm throttle body.
Includes the manifold, throttle body, TPS, fuel rails, crossover line, gaskets and hardware; injectors are not included.
The product listing explicitly limits the kit to cable-drive applications and says it is not for drive-by-wire systems.

9.1

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Best 92mm TPS/IAC kit

YESHMA IM-1001A-BK-XZ

For cathedral-port EFI users who want a 92 mm kit with TPS and IAC hardware; the listing does not establish the required throttle-control strategy.

Listed for LS1, LS2, LS6 and related 4.8L, 5.3L and 6.0L cathedral-port applications.
Includes a 92 mm throttle body with TPS and IAC, fuel rails, crossover line, gaskets and hardware.
Injectors are not included, and the listing provides no clear drive-by-wire compatibility statement.

9.0

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Best street dual-plane

JGhyperX 300-130

For a carbureted cathedral-port street engine seeking a broad 1,500–6,500 RPM operating window; it is not an EFI manifold.

Listed as a complete dual-plane carbureted intake for GM LS1, LS2 and LS6 cathedral-port applications.
Published product information lists a 1,500–6,500 RPM basic operating range and 5.60-inch intake height.
The carbureted layout means EFI throttle-body, injector, rail and ECU requirements do not apply as a direct bolt-on package.

8.9

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Best rectangle-port Hi-Ram

JGhyperX 300-116

For LS3, L76, L92 or L99 rectangular-port builds targeting a high-RPM or boosted-style combination; its 12.32-inch height demands careful clearance planning.

Listed for rectangular-port LS3/L76/L92/L99 heads with a 92 mm throttle-body bore and multi-port EFI layout.
Published product information lists a 3,500–8,000 RPM operating range and 12.32-inch front and rear height.
Includes an intake manifold and fuel rail kit, but the complete throttle-body, injector and vehicle-clearance plan still must be confirmed.

8.8

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Best low-profile rectangle-port

Htostar Racing IM-1015-S-JL

For LS3-style rectangular-port EFI swaps where a lower package is more useful than a tall Hi-Ram; aftermarket heads and truck accessories may create fitment issues.

Listed for LS3 and other rectangular-port LS-based engines with a 102 mm inlet and approximately 6.5-inch height.
The product listing gives an approximately 1,800–6,500 RPM range and includes vacuum ports, a MAP port, fuel rail kit, brackets, seals and hardware.
The listing warns that aftermarket heads may misalign and that a new LS1 water pump and bracket may be required for some truck accessory clearances.

8.7

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Best tall cathedral-port base

GSTP IM-1011B-S-RS

For cathedral-port builders who already have a compatible throttle body and want detailed fuel-rail and vacuum provisions; the 210 mm height is a major packaging constraint.

Listed for LS1, LS2 and LS6 cathedral-port engines with a 92 mm inlet and 210 mm height.
Uses listed 1/8-inch T6061 aluminum and includes vacuum fittings, a rear M12 x 1.25 MAP port, fuel-rail hardware and intake seals.
The listing describes a fuel-rail bracket for original LS1, LS6 or LS2 injectors, but it does not list a throttle body.

8.6

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Best cathedral-port Hi-Ram

JGhyperX 300-122

For cathedral-port EFI combinations built around upper-RPM airflow and 92 mm hardware; its 3,500–8,000 RPM range is less naturally matched to a mild street engine.

Listed for LS1, LS2 and LS6 cathedral-port engines with a 92 mm throttle-body bore.
Published product information lists a 3,500–8,000 RPM basic operating range and fuel rails machined for -8 AN O-ring fittings.
The package identifies an intake manifold and fuel rail kit, so throttle-body, injector, fittings and control compatibility need separate confirmation.

8.5

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Best carbureted single-plane

JGhyperX 300-132

For a carbureted cathedral-port engine that spends more time above the street-torque range; its 2,500–7,000 RPM focus is less broad than the dual-plane alternative.

Listed as a single-plane carbureted manifold for LS1, LS2 and LS6-style cathedral-port heads.
Published specifications list a 2,500–7,000 RPM range, 4.95-inch height and a square-bore four-barrel carburetor pattern.
It is a standard-deck, aluminum intake section with no EGR listed, so EFI components are not part of the stated configuration.

8.4

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Best for existing hardware

YESHMA IM-1011-S-XZ

For cathedral-port owners who already have a suitable 92 mm throttle body and want a fuel-rail-ready manifold; the package does not include the throttle body or injectors.

Listed for LS1, LS2, LS6 and related 4.8L, 5.3L, 5.7L and 6.0L cathedral-port engines.
Includes the 92 mm manifold, fuel rails, fuel crossover line, gaskets and hardware.
The listing specifically excludes the injector and throttle body, making flange, actuation and injector-spacing checks essential.

8.2

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Comparison Summary

The shortlist divides into four practical groups. POSENG and YESHMA offer 92 mm cathedral-port EFI packages, while Htostar Racing adds a more explicitly equipped 102 mm cable-drive kit. JGhyperX model 300-130 is the street-oriented carbureted dual-plane choice, and model 300-132 is the lower, higher-RPM single-plane alternative. For rectangular-port LS3/L92 builds, JGhyperX 300-116 is a tall 92 mm Hi-Ram and Htostar Racing IM-1015-S-JL is a lower-profile 102 mm option. GSTP and JGhyperX 300-122 serve cathedral-port builders who already understand their required throttle body, fuel fittings and packaging.

Buying Guide

Sizing and Capacity

For an LS intake manifold, sizing means more than throttle-body diameter. Start with the cylinder-head port family: cathedral-port LS1, LS2 and LS6-style heads are not the same interface as rectangular-port LS3, L76, L92 or L99 heads. The first three EFI picks and the cathedral-port carbureted models are aimed at the former group, while JGhyperX 300-116 and Htostar Racing IM-1015-S-JL target rectangular-port applications.

A 92 mm inlet is common across several cathedral-port options and can suit a wide range of street and performance combinations. A 102 mm inlet can be appropriate when the rest of the induction system, throttle-body flange and engine combination support it, but the larger label is not automatically better. Published height is equally important. JGhyperX 300-116 lists 12.32 inches, GSTP lists 210 mm, and Htostar Racing IM-1015-S-JL lists approximately 6.5 inches. Compare the complete installed assembly, including the throttle body, fuel rails, fittings, intake tube, hood and accessories.

Feature Tradeoffs

EFI and carbureted manifolds are separate purchasing paths. POSENG and YESHMA offer throttle-body EFI packages, while the JGhyperX 300-130 and 300-132 are carbureted manifolds. A carbureted manifold will not substitute for an EFI intake without addressing the fuel and engine-control system, and an EFI manifold does not automatically include injectors, sensors, ECU calibration or every required fitting.

Runner and plenum design also change the intended use. The 300-130 dual-plane is listed for 1,500–6,500 RPM and is the more street-oriented carbureted choice. The 300-132 single-plane lists 2,500–7,000 RPM, while the 300-116 and 300-122 Hi-Ram models list 3,500–8,000 RPM. Those ranges help identify the intended operating emphasis, but they are not universal power guarantees. Tall Hi-Ram designs can support a high-RPM plan while creating hood, cowl, throttle-linkage and intake-tube problems.

Best For, Avoid If

Profile	Recommended Product	Why It Fits	Avoid If
Cable-throttle cathedral-port EFI swap builder	Htostar Racing IM-1012A-S-JL	The listing combines a 102 mm inlet with a drive-by-cable throttle body, TPS, IAC, MAP provision and fuel-system interfaces.	Your engine uses drive-by-wire control or your LS2 injector arrangement cannot accommodate the listed spacer requirement.
Street-oriented carbureted LS owner	JGhyperX 300-130	The 300-130 dual-plane layout and listed 1,500–6,500 RPM range are the clearest match for a broad street-focused carbureted combination.	You need port EFI, a throttle-body assembly or an upper-RPM Hi-Ram design.
Rectangular-port LS3/L92 high-RPM builder	JGhyperX 300-116	It is listed for LS3/L76/L92/L99 rectangular ports with a 92 mm bore, fuel rail kit and 3,500–8,000 RPM range.	Your vehicle cannot accept the listed 12.32-inch height or your engine uses cathedral-port heads.
Rectangular-port EFI swap with limited vertical space	Htostar Racing IM-1015-S-JL	The approximately 6.5-inch height, 102 mm inlet and listed fuel-rail and vacuum provisions offer a lower package than the tall Hi-Ram option.	You have aftermarket heads or truck accessories that conflict with the listed alignment and water-pump clearance warnings.
Cathedral-port owner reusing a compatible throttle body	YESHMA IM-1011-S-XZ	The 92 mm manifold includes fuel rails, crossover, gaskets and hardware while leaving the throttle-body choice to the builder.	You need a complete throttle-body kit or do not already know the required flange, actuation and injector arrangement.

Key Specs to Compare

Check these specifications before choosing an LS intake manifold:

Port family and sealing pattern: cathedral-port versus rectangular-port heads, including any aftermarket head changes.
Induction type: multi-port EFI, throttle-body EFI or carbureted, with the correct flange and fuel-system layout.
Throttle control: cable or drive-by-wire, plus TPS, IAC, connector and ECU requirements.
Bore size: 92 mm or 102 mm, matched to the throttle body and the rest of the intake path rather than chosen by size alone.
Runner and plenum orientation: dual-plane, single-plane or Hi-Ram, matched to the intended RPM range.
Installed height and length: include the throttle body, rails, fittings, linkage, intake tube and accessories.
Kit contents: injectors, rails, crossover, MAP and vacuum ports, gaskets, brackets, bolts and any required spacers.
Fuel interfaces: for example, JGhyperX 300-116 and 300-122 list -8 AN rail provisions, which may require matching plumbing.

Setup and Handling Considerations

Plan the installation around the exact engine rather than the model name alone. Confirm the cylinder-head casting, bolt and sealing pattern, injector length, rail spacing, MAP location, PCV and vacuum needs, throttle actuation and ECU strategy before ordering. A manifold that fits the head can still interfere with the hood, firewall, water pump, accessories or fuel fittings.

Several listings state that instructions are not included, and professional installation is recommended for some of the EFI kits. Lay out the manifold, throttle body, rails, gaskets, fittings and hardware before removing the old intake. POSENG is explicitly cable-drive only, Htostar Racing IM-1012A-S-JL is also listed with drive-by-cable control, and the YESHMA 92 mm kit does not establish DBW compatibility. Do not assume the throttle body, TPS or IAC connector will match the vehicle without checking the actual parts.

Maintenance and Longevity

A properly matched intake manifold should be treated as part of the engine’s sealing and fuel-delivery system. During installation, inspect the mating surfaces, gaskets, bolt condition, fuel-rail fittings, vacuum plugs and sensor ports. After the engine is running, check for vacuum leaks and fuel seepage, especially around added fittings, rail connections and throttle-body interfaces.

The listings identify several manifolds as aluminum, including 3 mm or 1/8-inch T6061 construction, and some identify TIG-welded fabrication. Those are construction details, not a guarantee of perfect fit or long-term service. Avoid forcing misaligned rails, spacers or fittings into place. If an application requires injector spacers, a different water pump or accessory bracket, resolve that fitment before final assembly rather than adapting parts under tension.

Reliability Signals

The strongest reliability signals in these listings are precise port and engine-family descriptions, clear throttle-control information, documented included hardware and useful dimensional details. Htostar Racing IM-1012A-S-JL clearly identifies cable operation, TPS and IAC hardware, while POSENG clearly states its cable-only limitation and excludes injectors. JGhyperX provides model-specific RPM ranges and dimensions for its carbureted and Hi-Ram products.

Construction descriptions such as T6061 aluminum, TIG welding and listed fuel-rail fittings help establish what the product is intended to be, but they do not replace a complete fitment check. Some manufacturers publish limited warranty terms, including one-year terms on the JGhyperX listings and a three-month term on GSTP. Treat warranty coverage as a fallback rather than proof that the manifold will match an unusual head, accessory or control combination.

How to Compare Reviews

Prioritize exact-model comments over reviews grouped across multiple brands or colors. A useful review should identify the actual part number, engine family, head port shape, throttle-control type and vehicle or swap configuration. For example, a review of Htostar Racing IM-1012A-S-JL is most useful when it confirms a cable-drive cathedral-port installation, while feedback on JGhyperX 300-116 should be judged against a rectangular-port LS3/L92 build and its unusually tall 12.32-inch package.

Look for concrete compatibility details: whether the throttle body cleared the hood, whether the fuel rails matched injector length, whether the MAP and vacuum ports were usable, and whether spacers or accessory changes were required. Separate comments about missing hardware or sealing problems from claims about power. A review describing a successful carbureted 300-130 installation does not establish EFI compatibility, and a high-RPM Hi-Ram review does not make that design ideal for every street engine.

Common Mistakes

The most expensive mistake is buying by engine displacement alone. A 5.7L or 6.0L label does not confirm cathedral versus rectangular ports, injector spacing, throttle-body pattern or accessory clearance. Verify the actual head casting and manifold interface.

Do not assume a 102 mm throttle body is automatically an upgrade over a 92 mm unit. Match the bore, flange, actuation and intake tube to the complete combination. Do not assume that a throttle body with TPS and IAC will communicate with the existing ECU, or that included fuel rails mean injectors and plumbing are included.

Finally, do not overlook height. The 12.32-inch JGhyperX 300-116 and 210 mm GSTP design require more clearance planning than a lower-profile manifold. Confirm hood, cowl, water-pump, accessory, fuel-fitting and throttle-linkage clearance before ordering, and treat advertised vehicle compatibility as a starting point rather than a substitute for measuring the installed engine.

Frequently Asked Questions

Which of these LS intake manifolds fit cathedral-port heads?

Htostar Racing IM-1012A-S-JL, POSENG IM-1001A-BK-CS, YESHMA IM-1001A-BK-XZ, GSTP IM-1011B-S-RS, JGhyperX 300-122 and YESHMA IM-1011-S-XZ are listed for LS1, LS2, LS6 or related cathedral-port applications. Always compare the actual head casting and sealing pattern before ordering.

Which products are for rectangular-port LS3 or L92 heads?

JGhyperX 300-116 is listed for LS3, L76, L92 and L99 rectangular-port heads. Htostar Racing IM-1015-S-JL is listed for LS3 and other rectangular-port LS-based engines. These should not be treated as direct cathedral-port substitutes.

Do these intake manifold kits include injectors?

The POSENG and YESHMA 92 mm EFI listings explicitly exclude injectors. Other listings identify fuel rails or fuel-rail kits but do not establish that injectors are included. Verify injector length, connector style, flow requirement and rail spacing separately.

Is a larger 102 mm throttle body automatically better than a 92 mm model?

No. The throttle body must match the manifold flange, intake tube, control strategy and engine combination. A 102 mm option may be appropriate for a high-airflow build, while a 92 mm package can be the better fit for a street engine or an existing EFI system.

What should I verify before installing a Hi-Ram manifold?

Check total installed height, hood and cowl clearance, throttle-body position, fuel-rail fittings, intake-tube routing, accessory clearance, MAP and vacuum provisions, and ECU compatibility. JGhyperX 300-116 lists 12.32 inches of height, so the bare manifold dimension is not the complete clearance requirement.

Final Recommendation

Htostar Racing IM-1012A-S-JL is the best overall recommendation for a cable-throttle cathedral-port EFI swap because its listing combines a 102 mm inlet with a cable-drive throttle body, TPS, IAC, MAP and vacuum provisions, and stated fuel-injector compatibility guidance. Choose POSENG IM-1001A-BK-CS instead when a 92 mm cable-drive package better matches the engine and you want fuel rails, crossover, gaskets and hardware included. For a different use case, JGhyperX 300-130 is preferable for a carbureted street build because its dual-plane design and listed 1,500–6,500 RPM range are better aligned with broad street operation.